Trimming-machine.



C. K. MACDONALD.

TRIMMING MACHINE.

APPLlcATloN FILED Nov. 4. 1915.

'41,235,70-9. l PatentedAug. 7,1917.

UNITED STATES PATENT OFETCE CLIFFORD K. MACDONALD, 0F BROCKTON,MASSACTIUSETTS, ASSIGNOR TO NUKNITED SHOE MACHINERY COMPANY, OFPATERSON, NEW JERSEY,V A GOEPORATION vOIE' NEW JERSEY.

TRIMMINGr-MACHINE.

Specification of Letters Patent.

Patented Aug. 7, 1917.'

Application led November 4, 1915. Serial No. 59,594.

drawings, is a specification, like reference characters on the drawingsindicating like parts in the several figures.

This invention relates to trimming machines such as are used in themanufacture of boots Vand shoes, and is of particular utilm shoemanufacture for making a slight cut or bevel along the margin 0f theupper surface of the welt in a welt shoe prior to the final edgetrimming operation upon the sole and the welt. The invention istherefore illustrated herein in its application to this machine; butitwill be readily understood from a consideration of the constructionhereinafter described that the invention in its broader aspects is notlimited to machines for performing this particular operation upon ashoe'.

In cutters such as are commonly used for performing the final edgetrimming operation upon shoe soles the teethV are provided with slightprojections in the formof lips adapted to make a slight bevel at theupper corner of the sole or welt edge so as to insure a clean cutacrossthe edge and thus improve the appearance of the shoe. The cut madeby these lips should in no case extend inward far enough to injure thesole attaching stitches; and it is desirable bothfor this reason and forthe sake of the nalv appearance of the edge that the cut should be assmall as possible consistent with the object in view. It is found,however, that after the attachment of the sole to the welt v by theusual row of stitches that are located at some distance inwardly fromthe edge, the upper surface of the welt at itsv outer edge is likely tobe somewhat uneven and not precisely parallel at all points to thesurface of the sole. In view of this conditionit is frequentlynecessary, in order to make a clean cut in trimming they edge, toextendY the lip of the edge trimming cutter farther than would otherwisebe required, with the result that the bevel formed bythe lips is deeperthan is desirable. It is the practice,`

ity as appliedto a machine which is used therefore, particularly in themanufacture of the best shoes, to trim the upper surface of thewelt atits outer edge prior to the final edge" trimming operation so' as topresentan even surface to the lips of the edge trim ming cutter and thuspermit a clean cut to be made at the upper corner of the Vwelt edgewithout the necessity of using a cutter in which the bevelingprojections or lips are unduly large. A type of machine commonly usedfor this purpose includes a cutter having cutting edges formed upon asubstantially conical end face next to the shaft upon which the cutteris mounted, together with means for controlling the extent or depth ofthe cut comprising a collar secured to the shaft adjacent to the conicalVfacey ofl the cutter and arranged to engage the sole edge Y to guidethe shoe as it isk turned to bring different portions of the welt intothe field of operation of the cutter.

In the use of a `welt trimming machine of this construction it has beenfound that they work guiding collar, which rotates with the cutter shaftin a direction opposite to that in which the shoe is moved by theoperator,

renders it diflicult for the'operator to control the position'of'theshoe. Itis, moreover,

desirable at times to vary the extent or depth of the cut, sinceondifferentshoes or styles of shoes the distance between theedge Vof thesole and the'line of stitches may vary and lit is necessary in all casesto insure against cutting inward as far as the stitches. On the machinesin use heretofore such variation could be effected only by changing thework guiding collar on the cutter shaft and trouble involved haveheretofore rendered it impracticable to adjust 'the machine forrelatively vsmall variations in the character of the work.

It is an im ortant object of this invention to improve t ework guidingmeans in machines of the above described character so as to avoid thedifliculties heretofore encountered in the use of such machines. To thisend a feature of the invention consists in a novel and improvedconstruction of work guiding means arranged to permit quick ad-Vjustment for varying the vextent or depth of the cut.v The 'inventionprovides', also, a

dependent of the rotation of the cutter shaft,

and in the preferred, construction shown thisV member comprises a rollwhich is free to be turned by the work as the latter is moved inengagement with it. This construction serves to facilitate themanipulation of the work and constitutes av further important feature ofthe invention.

The above and other features of the invention, including certain detailsof construction and combinations of parts, will now be vdescribedV withreference to 'theac' companying drawings and pointed out in the claims.

In the drawingsV-f Figure l is a front elevation of the upper portion'of a machine in which the invention is embodied, v

Fig. 2 is a plan view of a portionzof the mechanism shown in Fig. 1, andY Fig. 3 is a vertical section through the work guidev and parts of themechanism associated therewith.

Mounted in bearings in the Vframe 2 of the machine is a rotary shaft 4upon the reduced outer end of which is secured a cutter 6 provided withcutting teeth lupon itsV conical end face next to the shaft. Clampedupon the frame 2 by means of a screw 8 is a bracket 10 upon the outerend of which is secured a depending cutter shield or guard 12 provided,as rsual, on the side next to the cutter with a slight depression inwhich the larger end of the cutter is received in close relation to theguard so as to protect the upper of the shoe from contact with thecutter. This guard, in the operation of the machine,

is positioned'in the crease between the upper and the welt of the shoeand thus serves also i to determine the position of the shoe longitulThe bracket 10 y dinally ofy the cutter axis. is slidably mounted uponthe frame 2A for adjustment longitudinally of the shaft 4, and in orderto facilitate precise adjustment of the bracket so as to position theguard 12 in the desired close proximity to the cutter, the machineincludes an adjusting screwlec one end of which is seated in a bearingin theframe 2, while the other end is threaded for engagement in athreaded bore in the bracket. After the bracket has beenY adjusted itmay be securely clamped in positionbv the screw 8.V

The bracket 10 is provided near its outer end withy a vertical openingin which is mounted a block 16 flanged Vat its lower side to voverlapportions of the bracket adjacent tothe opening and having secureduponits upper side a plate 18 which similarlyovery laps portions of` the topsurface Vvof the bracket, asshown in Fig. V2. The block 16 and the plate18 are bored vertically to receivea rod 20 which terminates at its lowerend in an eye 22 through whiclrthe reducedl Vportions of the shaft lextends, the diameter of the Vopening in the eye being considerablygreater than that of the reduced portion of the shaft. ySecured by a setscrew 24e within the opening in the eye 22 is a cylindrical bearingmember 26, larger in internal diameter than the reduced portion of theshaft and supporting upon its outer end portion a work engaging guidemember 28. rllhe guide 28 is freely rotatable on the bearing 26 and isretained in position by means of a flange 30 on the outer end of thebearing. Illhe rod 20 at its upper end is reduced and threaded', asshown at 32, to receive a nut 34e which bears upon the plate 18, and aspring 36 lencircling the rod between the block 16 and the eye 22 tendsto move the rod downwardly and rthus to maintain theA nut 311: firmly inengagement with the plate 18. A key 35 slidable in a groove 37 intheblock 16 serves to prevent the rod 2O from turning.

It will be seen that the block 16 and the plate 18 constitute a slidewhich is movable lengthwise of the opening in the bracket 1() inparallel relation to the cutter shaft so as to ust the guide 28longitudinally of the shaft and positionV the end of the Vguide in closeproximity to the working face of the cutter in any position oftransverse adjustment of the guide. In order that the guide may presentan extended bearing surface in engagement with the Vwork it is desirablethat it be positioned as closely as possible to the cutter, and in orderto facilitate such adjustment it is provided 'on the end adjacent to thecutter 'with a` beveled innerfe'dge, as shown at V38. For the purpose ofadjusting the guide lengthwise of the shaft a thumb screwl 40. isprovided, this screw having one end portion seated in a bearing in thebracket 10 and its opposite end threaded for engagement in athreadedborein the block 16.V rlhe block 16 may be retained securely in anyposition to which it is adjusted by the screw 4:0 by means of a setscrew 4t2 which is threadedin the bracket 10 and arranged to bear at itinner end against the block.

In the operation of the machine the shoe is presented as shown in F ig.1 withthe guard 12in the crease between the upper a and the welt b andwith the edge of the sole c and a portion of the edge of the weltinengagement with the guide 28. A portion of the cutter 6 which is exposedbetween Ythe guide 28 and the guard 12 will then operate upon the upperVsurface of the welt at its edge, and as lthe shoe Ais turned to bringdifferent portions of the work into the ii'eld of operation ofthercutter, the latter will trim the margin of the upper surface of thewelt evenlyy upon aslight ybevel and thus prepare the-shoe for effectiveand uniform treatment by .the edge trimming cutter. As the shoe is thusmoved, the `engagement of the. edge of the sole withk the guide 28 willany position of its transverse adjustment ef-v fected by the nut 84.After adjustment of the block 16 by means of the screw 40, .the screw l2may be tightened to insure against any change in the adjustment throughaccidental contact with the screw 4:0 or through the vibration of themachine. Change in the vertical adjustment of the guide from similarcauses is effectively prevented by the frictional engagement of the nut34C with the plate 18 under the pressure of the spring 36. Havingdescribed the invention, What I claim as new and desire to secure byLetters Patent of the United States is l. In a machine of the classdescribed, the combination With a rotary shaft and a cutter mounted onthe shaft and provided With an end yface adapted to form a bevel on theupper surface of a Welt in a shoe, of a guide arranged to engage theedge of the shoe sole to control the depth of said bevel, said guidebeing adjustable transversely of the shaft to vary the depth of thebevel and adjustable also longitudinally of the shaft to permit it toassume a position in close proximity toI the Working face of the cutterin any position of said transverse adjustment.

2. In a machine ofthe class described, the

- combination With a rotary shaft and a cutter mounted on the shaft andprovided with a conical end face adapted to form a bevel on the uppersurface of a Welt in a shoe, of a guide encircling the shaft andarranged to engage the edge of the shoe sole to control the depth ofsaid bevel, said guide being adjustable both transversely andlongitudinally of the shaft and having a beveled end surface to permitit to be positioned inv close proximity to the cutter.

3. In a machine of the class described, the combination With a rotaryshaft and a Welt beveling cutter mounted on the shaft, of a guideextending around the shaft adjacent to the cutter and arranged to engagethe edge of the Work to control the depth of the bevel on the Welt, saidguide having an enlarged opening to permit it to be adjustedtransversely of the shaft, means for effecting said adjustment of theguide, and means for adl justing the guide also longitudinally of theshaft to position it in close relation to the cutter in any position ofsaid transverse adjustment.

4:. In a machine of the class described, the

saidy adjustment of the` guide,'and means for retainingthe guide .in anyposition to Which it is adjusted'.y f

5. In a machine of the class described, the combination with a rotaryshaft and a cutter mounted on the shaft and arranged to bevel the Weltof a shoe, of a guide arranged to engage the edge of the shoe sole tocontrol the depth of the bevel on the Welt, said guide being adjustableboth transversely and 'longitudinally of the shaft.

6. In a machine of the class described, the combination with a rotaryshaft and a cutter mounted onl the shaft, of a guide encircling theshaft and comprising a roll arranged to turn ink contact With the Work,said guide having an opening of greater diameter than the shaft topermit it to be adjusted transversely of the shaft.

7. In a machine of the class described, the combination With a rotaryshaft and a cutter mounted on the shaft, of a guide comprising a rollarranged to turn in contact With the Work, said roll being adjustabletransversely of the shaft to vary the depth of the cut and adjustablealso longitudinally of the shaft to position it in close relation to thecutter in any position of said transverse adjustment.

8. In a machine of the class described, the l combination With a rotaryshaft and a cutter mounted on the shaft, of a bearing member encirclingthe shaft and having an opening of larger diameter than the shaft ltopermit it to be adjusted transversely of the shaft, and a roll rotatableupon said member adjacent to the cutter, said roll being arranged theshaft, and a roll rotatable upon said member adjacent to the cutter,said roll being arranged for engagement With the edge of the shoe soleto control the depth of the bevel on the Welt and to be turned by theWork as the latter is moved to'transfer the point of operation of thecutter along'the Welt. v Y y 10. In a machine of the class described,the combination With a rotary shaft and a cutter mounted on the shaft,,of a slide mov# able at one side of the shaft longitudinally thereof, arod longitudinally adjustable in the slide and extending toward theshaft, a bearing member carried by said rod and encircling the shaft,said member having an opening of greater diameter than the shaft throughwhich the shaft extends, and a roll mounted upon said bearing member inposi-v tion to `engage the Work adjacentgto they cutter.

11; In a machine of the class' described, a rotary shaft havingV abeveled cutter on its end, the bevel being turned toward the shaft, anda guide arranged adjacent the bevel to be contacted by the edge of asole presented to the cutter, said guide being adjustable transverselyof the shaft to control the depth of bevel. s In testimony whereof Ihave Signed my name to this speciioation.

CLIFFORD K. MACDONALD.

Copies oi this patent may be obtained for ve cents each, by addressingthe Commissioner of Patents,

Washington, ID. C.

